Back sleep blocker



FIG. 1 is a perspective view of the back sleep blocker in accordance with the present design.

FIG. 2 is a top plan view of the back sleep blocker of FIG. 1.

FIG. 3 is a side elevational view of the back sleep blocker of FIG. 1, it being understood that the opposite side view (not shown) is a substantial mirror image of the side view as shown.

FIG. 4 is a side elevational view of the back sleep blocker of FIG. 1, shown in a vertical orientation, it being understood that the opposite side view (not shown) is a substantial mirror image of the side view as shown; and,

FIG. 5 is a bottom plan view of the back sleep blocker of FIG. 1.

The broken lines in the drawings are for the purpose of illustrating portions of the back sleep blocker that form no part of the claim. 

CLAIM I claim the ornamental design for a back sleep blocker, as shown and described. 